Blog Archives

Getting Started with R

December 2, 2017
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Rstudio OverView we have 4 panes1) script pan - to write and save the programing script2) Console pane - where all the code will get executed3) Environment/history pane - displays all the variables created,functionsused with in the current session4) Helper pane - contains multiple tabs to install/display pacakges,view visualization plots,locate files within the...

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information retrieval document search using vector space model in R

November 4, 2017
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information retrieval document search using vector space model in R

Introduction:In this post, we learn about building a basic search engine or document retrieval system using Vector space model. This use case is widely used in information retrieval systems. Given a set of documents and search term(s)/query we need to retrieve relevant documents that are similar to the search query. Problem statement:The problem statement explained above...

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apply lapply rapply sapply functions in R

March 18, 2016
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apply lapply rapply sapply functions in R

As part of Data Science with R, this is third tutorial after basic data types,control structures in r.One of the issues with for loop is its memory consumption and its slowness in executing a repetitive task at hand. Often dealing with large data and iterating it, for loop is not advised. R provides many few alternatives to be applied...

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apply lapply rapply sapply functions in R

March 18, 2016
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apply lapply rapply sapply functions in R

As part of Data Science with R, this is third tutorial after basic data types,control structures in r.One of the issues with for loop is its memory consumption and its slowness in executing a repetitive task at hand. Often dealing with large data and iterating it, for loop is not advised. R provides many few alternatives to be applied...

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Control Structures Loops in R

February 27, 2016
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Control Structures Loops in R

As part of Data Science tutorial Series in my previous post I posted on basic data types in R. I have kept the tutorial very simple so that beginners of R programming  may takeoff immediately. Please find the online R editor at the end of the post...

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Principal Component Analysis using R

February 27, 2016
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Principal Component Analysis using R

Curse of Dimensionality:One of the most commonly faced problems while dealing with data analytics problem such as recommendation engines, text analytics is high-dimensional and sparse data. At many times, we face a situation where we have a large set of features and fewer data points, or we have data with very high feature vectors. In such scenarios, fitting...

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Basic Data Types in r

February 16, 2016
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As part of tutorial series on Data Science with R from Data Perspective, this first tutorial introduces the very basics of R programming language about basic data types in R.What we learn:Assignment OperatorNumericIntegerComplex numberlogicalCharacterFactorVectorData FrameAfter the end of the chapter, you are provided with R console so that you can practice what you have learnt in this chapter.R assignment...

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Data Science with R

December 24, 2015
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Data Science with R

As R programming language becoming popular more and more among data science group, industries, researchers, companies embracing R, going forward I will be writing posts on learning Data science using R. The tutorial course will include topics on data types of R, handling data using R, probability theory, Machine Learning, Supervised – unSupervised learning, Data Visualization using R, etc....

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Item Based Collaborative Filtering Recommender Systems in R

November 18, 2015
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Item Based Collaborative Filtering Recommender Systems in R

In the series of implementing Recommendation engines, in my previous blog about recommendation system in R, I have explained about implementing user based collaborative filtering approach using R. In this post, I will be explaining about basic implementation of Item based collaborative filtering recommender systems in r. Intuition:Item based Collaborative Filtering:Unlike in user based collaborative filtering discussed previously, in...

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Data Mining Standard Process across Organizations

October 18, 2015
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Data Mining Standard Process across Organizations

Recently I have come across a term, CRISP-DM - a data mining standard. Though this process is not a new one but I felt every analyst should know about commonly used Industry wide process. In this post I will explain about different phases involved in creating a data mining solution. CRISP-DM, an acronym for Cross Industry Standard Process for...

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